Inventory (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
|
| Inventory [Line Items] | |||
| Inventory transferred (to)/from Property and Equipment | $ 0 | $ (1) | |
| Inventory transferred (to)/from Assets Held for Sale | (5) | ||
| Completed VOI inventory | 918 | $ 857 | |
| Proceeds from Advance for and Contribution in Aid of Construction, Financing Activity and related interest | 29 | ||
| Inventory Sold Under Agreement to Repurchase, Value | 27 | ||
| Maximum [Member] | Variable Interest Entity, Not Primary Beneficiary | |||
| Inventory [Line Items] | |||
| Inventory Sold Under Agreement to Repurchase, Repurchase Liability | 180 | ||
| Balance Sheet Location [Axis]: us-gaap:OtherAssets | |||
| Inventory [Line Items] | |||
| Completed VOI inventory | $ 21 | ||